How do I see what is being played by Plex apps?

Content that is actively being played (by supported Plex apps) will appear in the Now Playing area in the Plex Web App. You can visit that to see details about what is being played, who is playing it, which app is being used, and how far they are through playback.

Related Page: Plex Media Server > Using Plex Web App > Activity

A history of past access is not currently available.